Some foods make it really difficult to lose weight. They create their own self-sustaining cravings ("Betcha can't eat just one!") and play havoc with your blood sugar and, ultimately, your waistline. But other foods do just the opposite. You might have heard that certain foods can help you shed pounds. It's true! Here are some other tasty options that will fuel you up and generate weight loss. Make these foods a part of your daily diet and watch the pounds come slipping off.

1) Grapefruit. Ever tried the grapefruit diet? Turns out there may be some good research to back up grapefruit's reputation as a fat fighter. In a 2004 study at the Scripps Clinic in La Jolla, California, researchers investigated the effect of grapefruit on weight loss and found that eating half a grapefruit before a meal can actually help people drop weight. The researchers studied the effect of grapefruit capsules, grapefruit juice and real grapefruit. All three seemed to help, but the folks eating the real grapefruit got the best results. The mechanism isn't completely understood, but the results speak for themselves. As an added benefit, grapefruit contains cancer-fighting compounds like liminoids and lycopene, and red grapefruit has been shown to help lower triglycerides. And half a grapefruit has only 39 calories.

2) Sardines. Sardines might just be one of the greatest health bargains of all time, and they're a boon to anyone wanting to lose weight. First of all, sardines are loaded with protein, which helps stabilize blood sugar, makes you feel full and helps stimulate metabolism. Second, they're a great source of omega-3s, which not only strengthen the cardiovascular system but also are helpful in boosting mood. (And when you're in a good mood, you tend to crave less junk food!) Third, sardines are convenient, easy to find and cheap. And because they're very low on the food chain, they're remarkably free of contaminants, such as mercury and heavy metals.